14х(х-4) - (х+1)(9х-30) 14х²-56х-9х²+30х-9х+30
----------------------------- < 0 ------------------------------- < 0
(х+1)(х-4) (х+1)(х-4)
5х²-35х+30 5(х-6)(х-1)
-------------- < 0 -------------- < 0
(х+1)(х-4) (х+1)(х-4) Нули: -1; 1; 4; 6
+ - + - +
----------о------------о-------------о----------------о--------------------------------->
-1 1 4 6
Ответ: (-1;1)U(4;6)